ui: update ProductPerformanceProfitability page to enhance table views and tabs management

svc/routes/product_performance.go

@@ -240,6 +240,27 @@ func GetProductPerformanceCustomersHandler(pg *sql.DB) http.HandlerFunc {
 	}
 }
 
+func GetProductPerformanceSalesBreakdownHandler(pg *sql.DB) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json; charset=utf-8")
+		traceID := utils.TraceIDFromRequest(r)
+		ctx, cancel := context.WithTimeout(utils.ContextWithTraceID(r.Context(), traceID), 45*time.Second)
+		defer cancel()
+
+		rows, err := queries.ListProductPerformanceSalesBreakdown(
+			ctx,
+			pg,
+			strings.TrimSpace(r.URL.Query().Get("mode")),
+			intQuery(r, "limit", 500),
+		)
+		if err != nil {
+			http.Error(w, "satis kpi kirilimi alinamadi: "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+		_ = json.NewEncoder(w).Encode(rows)
+	}
+}
+
 func intQuery(r *http.Request, key string, fallback int) int {
 	raw := strings.TrimSpace(r.URL.Query().Get(key))
 	if raw == "" {